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You drive a car at a speed of 70 km//h i...

You drive a car at a speed of `70 km//h` in a straight road for 8.4 km, and then the car runs out of petrol. You walk for 30 min to reach a petrol pump at a distance of 2 km. The average velocity from the beginning of your drive till you reach the petrol pump is

Text Solution

Verified by Experts

Here, total distance travelled = (8.4 + 2) km = 10.4 km
Total time taken = `(8.4)/(70) +1/2 = 0.62 h`
Average velocity = Total distance travelled/total time taken
` = (10.4)/(0.62) = 16.8 km h^(-1)`
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Knowledge Check

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